Normalize fullwidth punctuation to ASCII across codebase.

Add scripts/normalize_ambiguous_unicode.py; fix corrupted patch_instance_theme_templates.py. Preserves curly quotes in string literals; removes Git homoglyph warnings on .env.example.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/hub/hub_entry_plan_lib.py

@@ -1,4 +1,4 @@
-"""中控开仓计划：进行中 / 历史归档 / 胜率统计。"""
+"""中控开仓计划:进行中 / 历史归档 / 胜率统计."""
 
 from __future__ import annotations
 
@@ -338,7 +338,7 @@ def resolve_stats_date_bounds(
     date_from: str = "",
     date_to: str = "",
 ) -> tuple[str | None, str | None, str]:
-    """返回 (date_from, date_to, label)；all 时 bounds 为 None。"""
+    """返回 (date_from, date_to, label);all 时 bounds 为 None."""
     p = (period or "all").strip().lower() or "all"
     today = _today_iso()
     if p == "all":